/// <summary> Determines equality by delegating to other compare. </summary>
/// <param name="x">The first instance.</param>
/// <param name="y">The other instance.</param>
/// <returns>True if the instances are found equal.</returns>
public static bool Equal(ISymbol?x, ISymbol?y)
{
if (ReferenceEquals(x, y))
{
return(true);
}
if (x is null ||
y is null ||
x.Kind != y.Kind ||
x.MetadataName != y.MetadataName)
{
return(false);
}
return((x.Kind, y.Kind) switch
{
(SymbolKind.Field, SymbolKind.Field) => FieldSymbolComparer.Equal((IFieldSymbol)x, (IFieldSymbol)y),
(SymbolKind.Event, SymbolKind.Event) => EventSymbolComparer.Equal((IEventSymbol)x, (IEventSymbol)y),
(SymbolKind.Property, SymbolKind.Property) => PropertySymbolComparer.Equal((IPropertySymbol)x, (IPropertySymbol)y),
(SymbolKind.Method, SymbolKind.Method) => MethodSymbolComparer.Equal((IMethodSymbol)x, (IMethodSymbol)y),
(SymbolKind.Parameter, SymbolKind.Parameter) => ParameterSymbolComparer.Equal((IParameterSymbol)x, (IParameterSymbol)y),
(SymbolKind.Local, SymbolKind.Local) => LocalSymbolComparer.Equal((ILocalSymbol)x, (ILocalSymbol)y),
(SymbolKind.NamedType, SymbolKind.NamedType) => NamedTypeSymbolComparer.Equal((INamedTypeSymbol)x, (INamedTypeSymbol)y),
(SymbolKind.ArrayType, SymbolKind.ArrayType) => TypeSymbolComparer.Equal((ITypeSymbol)x, (ITypeSymbol)y),
(SymbolKind.DynamicType, SymbolKind.DynamicType) => TypeSymbolComparer.Equal((ITypeSymbol)x, (ITypeSymbol)y),
(SymbolKind.ErrorType, SymbolKind.ErrorType) => false,
(SymbolKind.PointerType, SymbolKind.PointerType) => TypeSymbolComparer.Equal((ITypeSymbol)x, (ITypeSymbol)y),
(SymbolKind.TypeParameter, SymbolKind.TypeParameter) => TypeSymbolComparer.Equal((ITypeSymbol)x, (ITypeSymbol)y),
(SymbolKind.Namespace, SymbolKind.Namespace) => NamespaceSymbolComparer.Equal((INamespaceSymbol)x, (INamespaceSymbol)y),
(_, _) => SymbolEqualityComparer.Default.Equals(x, y),
});
/// <summary> Determines equality by name, containing type and type. </summary>
/// <param name="x">The first instance.</param>
/// <param name="y">The other instance.</param>
/// <returns>True if the instances are found equal.</returns>
public static bool Equal(IPropertySymbol?x, IPropertySymbol?y)
{
if (ReferenceEquals(x, y))
{
return(true);
}
if (x is null ||
y is null)
{
return(false);
}
return(x.MetadataName == y.MetadataName &&
NamedTypeSymbolComparer.Equal(x.ContainingType, y.ContainingType) &&
TypeSymbolComparer.Equal(x.Type, y.Type));
}
static bool ParametersMatches(ImmutableArray <IParameterSymbol> xs, ImmutableArray <IParameterSymbol> ys)
{
if (xs.Length != ys.Length)
{
return(false);
}
for (var i = 0; i < xs.Length; i++)
{
if (xs[i].Name != ys[i].Name ||
!TypeSymbolComparer.Equal(xs[i].Type, ys[i].Type))
{
return(false);
}
}
return(true);
}
/// <summary> Compares equality by name and containing type and treats overridden and definition as equal. </summary> /// <param name="x">The first instance.</param> /// <param name="y">The other instance.</param> /// <returns>True if the instances are found equal.</returns> public static bool Equivalent(INamedTypeSymbol?x, INamedTypeSymbol?y) => TypeSymbolComparer.Equal(x, y);